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Finding the Fourth Proportional to 867,778.74, 1,302,507.70 and 418,815.70

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Solution

The fourth proportional to 867,778.74, 1,302,507.70 and 418,815.70 is: 628,628.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,778.74 : 1,302,507.70 = 418,815.70 : x
  2. Step 2: Convert to fraction form
    867,778.74/1,302,507.70 = 418,815.70/x
  3. Step 3: Cross multiply
    867,778.74x = 1,302,507.70 × 418,815.70
  4. Step 4: Simplify right side
    867,778.74x = 545,510,669,827.58
  5. Step 5: Solve for x
    x = 545,510,669,827.58/867,778.74
  6. Step 6: Final answer
    x = 628,628.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.